\pgfkeys{/tikz/.cd,
	vertical factor/.initial=0.5,
	vertical factor/.get=\vertfactor,
	vertical factor/.store in=\vertfactor,
	start coordinate/.initial=
	{0,\vertfactor
	},
	start coordinate/.get=\startcoord,
	start coordinate/.store in=\startcoord,
	sample color/.initial=black,
	sample color/.get=\samplecol,
	sample color/.store in=\samplecol,
	sample size/.initial=1pt,
	sample size/.get=\samplesize,
	sample size/.store in=\samplesize,
	sample line width/.initial=very thick,
	start coordinate/.initial =
	{ another/. style={0,\vertfactor}
	},
	sample line width/.get=\samplelinewidth,
	sample line width/.store in=\samplelinewidth,
	start coordinate/.initial=
	{0,\vertfactor
	}
	{something else
	},
}
